<mat-toolbar color="primary">
  <mat-toolbar-row>
    <mat-grid-list cols="24" rowHeight="fit">
      <mat-grid-tile
        colspan="1"><i class="material-icons md-light" (click)="toggle()">format_indent_increase</i></mat-grid-tile>
      <mat-grid-tile colspan="8"><div class="title">Angular 开发日记</div></mat-grid-tile>
    </mat-grid-list>
  </mat-toolbar-row>
</mat-toolbar>
